100% brand new and high quality Features: This module is a pulse generation module and provides a stepper driver as a signal. Simple controller + stepper drive + stepper motor + DC power supply can form a simple control platform. 3 Kinds of frequency signals: high 5.4k-160khz, medium 540-16.6khz, low 80-2.4khz, which can be selected by jumpers. Can generate pulse signal and PWM signal, which can be selected by jumpers. The PUL and common cathode (or common anode) of two ports can be measured. Specifications: Item Name: Stepper Motor Driver Color: Black Material: Printed Circuit Board Application: 3D printer Power Input: 8-24V Frequency Signals: 5.4k-160khz,540-16.6khz,80-2.4khz Model Number: Stepper Motor Purpose: For 3D printer feeding Suitable Filament: 1.75mm Quantity: 1pc Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Piece Stepper Motor Driver